A water-tiger, Dytiscus marginalis species; male beetle, the elytra of the female at side.
A water-tiger, Dytiscus marginalis species; anterior tarsus of the male, with sucking disks.
A water-scavenger, Hydrophilus triangularis species; structural detail of the adult.
A water-scavenger, Hydrophilus triangularis species; structural detail of the adult.
A water-scavenger, Hydrophilus triangularis species; structural detail of the adult.
A water-scavenger, Hydrophilus triangularis species; structural detail of the adult.
The whirligig beetles are a family (Gyrinidae) of water beetles that normally live on the surface of…